[ Apollo has to concentrate to follow what's being said, but he gets most of it! He is the god of knowledge, after all; Just because he doesn't participate in Athena and Hephaestus' more scientific discussions doesn't mean he doesn't get the concepts.

Besides, being a sun god, he should know a thing or two about gravity. ]

I never would have even considered that, at least not without extensive trial and error. I was just thinking of something like roller skates, or synchronized swimming, but there's a whole world of possibilities if that horizon problem got worked out.